A very complex or unsolvable problem.
一个非常复杂或无法解决的问题。 (yi ge fei chang fu za huo wu fa jie jue de wen ti)
"The issue of climate change is like a Gordian knot that needs bold action."
"气候变化的问题就像一个戈尔迪之结，需要大胆的行动。" (qi hou bian hua de wen ti jiu xiang yi ge ge er di an zhi jie xu yao da dan de xing dong)
to form groups of two
to be the first to do something innovative
to begin something, like a journey, very successfully
to make someone responsible for their actions
to lead the way in a new venture or innovation
a person who refuses to believe without proof
